The Value of Atheisim
The Sassover taught: "There is no quality of mind in men that is altogether without its uses. Even the meanest errors and those most fit to be abhorred have a goal of their own and may lead to God. But how about infidelity? Aye, even infidelity is not altogether barred. For if someone comes to you entreating aid, do not say in refusal: 'Trust in God; He will help,' but acts as if there were no God and none to help but you."
Source: Esser Tzachtzachoth